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Träfflista för sökning "swepub ;conttype:(refereed);srt2:(1980-1994)"

Search: swepub > Peer-reviewed > (1980-1994)

  • Result 1-10 of 24801
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1.
  • Andersson, Sören, et al. (author)
  • An adaptive array for mobile communication systems
  • 1991
  • In: IEEE Transactions on Vehicular Technology. - Toronto, Ont, Can : Institute of Electrical and Electronics Engineers (IEEE). - 0018-9545 .- 1939-9359. ; 40:1 pt 2, s. 230-236, s. 3289-3292
  • Journal article (peer-reviewed)abstract
    • The use of adaptive antenna techniques to increase the channel capacity is discussed. Directional sensitivity is obtained by using an antenna array at the base station, possibly both in receiving and transmitting modes. A scheme for separating several signals at the same frequency is proposed. The method is based on high-resolution direction-finding followed by optimal combination of the antenna outputs. Comparison with a method based on reference signals is made. Computer simulations are carried out to test the applicability of the technique to scattering scenarios that typically arise in urban areas. The proposed scheme is found to have great potential in rejecting cochannel interference, albeit at the expense of high computational requirements.
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2.
  • Doherty, Patrick, 1957-, et al. (author)
  • Fuzzy if-then-unless rules and their implementation.
  • 1992
  • In: International Conference on Information Processing and Management of Uncertainty in Knowledge-Based Systems, IPMU92,1992. - Linköping, Sweden : Springer.
  • Conference paper (peer-reviewed)
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3.
  • Ottersten, Björn, et al. (author)
  • Stochastic maximum likelihood estimation in sensor arrays by weighted subspace fitting
  • 1989
  • In: Conference Record - Asilomar Conference on Circuits, Systems & Computers. - Pacific Grove, CA, USA : Linköping University. ; , s. 599-603, s. 599-603
  • Conference paper (peer-reviewed)abstract
    • The problem of estimating parameters of multiple narrowband emitter signals from sensor array data is considered. Under the assumption of Gaussian distributed emitter signals, the stochastic maximum-likelihood (ML) technique is known to provide statistically efficient estimates, i.e., it achieves the Cramer-Rao bound (CRB). A multidimensional signal subspace method, termed weighted subspace fitting (WSF), has recently been proposed. It is shown that the WSF and ML estimates are asymptotically identical (for large data records). As a consequence, the WSF method is asymptotically efficient, assuming temporally white Gaussian signal waveforms and noise.
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7.
  • Wahlberg, Bo, et al. (author)
  • Robust Signal Parameter Estimation in the Presence of Array Perturbations
  • 1991
  • In: Proc. of 1991 International Conference on Acoustics, Speech, and Signal Processing, 1991. ICASSP-91.. - Linköping : IEEE. ; , s. 3277-3280
  • Conference paper (peer-reviewed)abstract
    • Signal parameter estimators which are less sensitive to perturbations in the array manifold are presented. A parametrized stochastic model for the array uncertainties is introduced. The unknown array parameters can include the individual gain and phase responses of the sensors as well as their positions. Based on this model, a maximum a posteriori (MAP) estimator is formulated. This results in a fairly complex optimization problem which is computationally expensive. The MAP estimator is simplified by exploiting properties of the weighted subspace fitting method. An approximate method that further reduces the complexity is also presented, assuming smallarray perturbations. A compact expression for the MAP Cramer-Rao bound (CRB) on the signal and arrayparameter estimates is derived. A simulation study indicates that the proposed robust estimation procedures achieve the MAP-CRB even for moderate sample sizes.
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8.
  • Wahlberg, Bo, 1959- (author)
  • System identification using high-order models, revisited
  • 1989
  • In: Proceedings of the 28th IEEE Conference on Decision and Control. Part 1 (of 3). - Linköping : Linköping University. ; , s. 634-639
  • Conference paper (peer-reviewed)abstract
    • The traditional approach of expanding transfer functions and noise models in the delay operator to obtain predictor models linear in the parameters leads to approximations of very high order in the case of rapid sampling and/or large dispersion in time constants. By using a priori information about the time constants of the system, more appropriate expansions, closely related to Laguerre networks, are introduced and analyzed. It is shown that these expansions need much lower orders to obtain reasonable approximations and improve the numerical properties of the estimation algorithm. Consistency (error bounds), persistence of excitation conditions, and asymptotic statistical properties are investigated.
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9.
  • Ljung, Lennart, 1946-, et al. (author)
  • Adaptive System Performance in the Frequency Domain
  • 1992
  • In: Adaptive systems in control and signal processing 1992. - Linköping : Linköping University. - 9780080425962 ; , s. 33-40
  • Conference paper (peer-reviewed)
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10.
  • Andersen, Poul, et al. (author)
  • Tackling Dynamics in Business Networks
  • 1994
  • In: 10th Annual IMP Conference, Groningen. - Groningen : University of Groningen, Faculty of Management & Organization.
  • Conference paper (peer-reviewed)
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  • Result 1-10 of 24801
Type of publication
journal article (18088)
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reports (930)
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review (58)
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Type of content
peer-reviewed  (24801)Undo refine
Author/Editor
Herlitz, Johan (177)
Turner, Anthony, 195 ... (170)
Åström, Karl Johan (167)
Svanberg, Sune (148)
Nordén, Bengt, 1945 (139)
Gerdin, Bengt, 1947- (127)
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Hjalmarson, Å (115)
Forssberg, Eric (114)
Ljung, Lennart, 1946 ... (107)
Maguire Jr., Gerald ... (104)
Berg, Sören (104)
Johnsson, Lennart (95)
Agardh, Carl-David (87)
Nordblad, P (81)
Stenius, P (79)
Knutsson, Hans (78)
Wiberg, Nils-Erik, 1 ... (76)
Steen, Stig (73)
Tesch, P.A (73)
Gillberg, Christophe ... (72)
Ny, Tor (71)
Adlercreutz, Patrick (70)
Möller, Claes, 1950- (70)
Mattiasson, Bo (69)
Sundqvist, Bertil (69)
Noz, Marilyn E. (67)
Johansson, Rolf (66)
Svensson, Arne, 1955 (66)
Danielsson-Tham, Mar ... (66)
Shahnavaz, Houshang (64)
Bååth, L.B. 1948- (64)
Granlund, Gösta H. (64)
Karlsson, Ulf O. (62)
LUNDGREN, L (61)
Rönnberg, Jerker, 19 ... (60)
Stephansson, Ove (60)
Wigertz, Ove, 1934- (60)
Söderström, Bengt (59)
Owman, Christer (59)
Küller, Rikard (58)
Jankowska, Elzbieta (58)
Gunnarsson, Britt-Lo ... (58)
Abrahamson, Magnus (57)
Axsäter, Sven (57)
Tove, PA (56)
Turner, APF (55)
Breimer, Michael, 19 ... (55)
Grubb, Anders (54)
Starrin, Bengt (54)
Nyholm, R. (54)
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University
Lund University (5936)
Uppsala University (3824)
Luleå University of Technology (2423)
Royal Institute of Technology (1635)
University of Gothenburg (1632)
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Chalmers University of Technology (1474)
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Karlstad University (667)
Stockholm University (449)
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University of Borås (230)
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Mälardalen University (84)
Blekinge Institute of Technology (82)
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Swedish Museum of Natural History (59)
Swedish National Defence College (51)
University West (48)
Stockholm School of Economics (44)
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Malmö University (23)
University of Skövde (14)
VTI - The Swedish National Road and Transport Research Institute (11)
The Nordic Africa Institute (5)
Red Cross University College (3)
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Swedish National Heritage Board (2)
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Stockholm University of the Arts (2)
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Language
English (21688)
Swedish (2601)
German (135)
French (129)
Russian (56)
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Undefined language (34)
Norwegian (18)
Italian (18)
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Research subject (UKÄ/SCB)
Natural sciences (5645)
Engineering and Technology (4821)
Medical and Health Sciences (4510)
Social Sciences (1822)
Humanities (1308)
Agricultural Sciences (561)

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